With its 45-year history, Kuhlman Instrument Co. has become the industry standard in pressure testing. All instruments are approved for use by leading utility companies and contractors, have a calibration certificate, and test for pressure ranging from inches of water to more than 300 psi. K3 models are approved by the Canadian Standard Association (CSA) and certified as intrinsically safe. K3 instruments also log and store data for up to 99 pressure tests for downloading and printing. Pressure due to air, natural gas, propane, nitrogen and carbon dioxide can be measured.